Question

Упростите: 

1.  2,5c+1,2+3,6c+5=? 

2.  8,8-9,7d-2,5d-3,7=?

Answer 1

1.  2,5c+1,2+3,6c+5=6,1с+6,8

2.  8,8-9,7d-2,5d-3,7=5,1-12,2d

Answer 2

1.   2.5с+1.2+3.6с+5=(2.5+3.6)с+6.2=6.1с+6.2

2.   8.8-9.7d-2.5d-3.7=5.1-(9.7-2.5)d=5.1-12.2d